Propeller.



H.F 0LGER. PROPELLER. APPLICATION vFILED MAR. 2. 191B.

15,284,684 A PatendNov. 12,1918.

NETE@ PATEN OBFOE.

HORACE FOLGER, OF GOODING, IDAHO.

PROPELLER.

Application led March 2, 1918.

To all wwm t may concern:

Be it known that HORACE FoLonR, a citizen of the United States, residingat Gooding, in the county of Gooding and State of Idaho, have inventedcertain new and useful Improvements in Propellers, of which thefollowing is a specification.

rIhis invention relates to propellers, and more particularly topropellers adapted for use on boats, although it is of course to beunderstood that it is equally applicable to other uses such asaeroplanes.

One of the objects of the present invention is to provide an improvedform of screw propeller having its parts so constructed, positioned andarranged as to obtain the maximum efficiency per revolution or permitequal power at slower rotation.

Another object is to provide a propeller of the above general characterwhich may be inexpensively manufactured and capable of adjustment to theblades of propellers of different pitch.

Other objects will be in part obvious from the annexed drawing and inpart indicated in connection therewith by the following analysis of thisinvention.

T his invention accordingly consists in the features of construction,combination of parts, and in the unique relations of the members and inthe relative proportioning and disposition thereof, all as morecompletely outlined herein.

To enable others skilled in the art so fullv to comprehend theunderlying features thereof that they may embody the same by thenumerous modifications in structure and relation contemplated by thisinvention, drawings depicting a preferred form have been annexed as apart of this disclosure, and in such drawings like characters ofreference denote corresponding parts throughout all the views` in which-Figure l is a side elevation showing the propeller applied to apropeller shaft, and

ig. 2 is an end elevational view.

Referring now to the drawings in detail, 5 denotes a propeller shaft ofany desired type having a plurality of propeller blades 6. eachpropeller blade being provided with an attachment T which` by itself, isshaped like one-half of a funnel. that is any transverse section thereofwill represent a Specification of Letters Patent.

Patented Nov. 12, 1918.

Serial No. 220,040.

semi-circle rather than the element of a screw which involves a reversecurve. These may be reinforced by stays 8 if desired.

One edge of this funnel is attached at 9 in any desired manner to thetail of one of the blades, while the opposite edge is secured also inany desired manner at the points 10 to the propeller shaft to extend atsubstantially a right-angle thereto. Each blade is provided with asimilar member secured thereto and to the propeller shaft as abovedescribed, thus increasing the effective propelling surface as themedium will be fed over the shaft as well as parallel thereto. It willthus be seen that as the propeller rotates in the direction of the arrowthe forward or nose edge of each blade will cut into the water or othermedium and force the same relatively rearwardly against the curvedsurface of the attachment 7, thereby to propel the craftl to which it isattached.

lt will thus be seen that the present invention comprises a simple andpractical propeller construction adapted to accomplish, among others,all of the objects and advantages herein set forth.

realize that considerable variation is possible in the details ofconstruction and arrangement of parts without departing from the spiritof my invention, and I there' fore do not intend to limit myself to thespecific form shown and described.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent is:

l. A propeller mechanism comprising, in combination, a shaft having anextended portion, a plurality of blades mounted on said shaft short ofthe end thereof. and a plurality of semi-funnel shaped deflectors eachsecured at one edge to a propeller blade and at its opposite edge to theshaft.

2. A propeller mechanism comprising. in combination, a shaft having anextended portion, a plurality of blades mounted on. said shaft short ofthe end thereof and a plurality of semi-funnel shaped deflectors eachsecured at one edge to a propeller blade and at its opposite edge to theshaft, said deflectors being provided with reinforcing stays.

In testimony whereof l aiiix my signature.

HORACE FOLGER.

Copies of this patent may be obtained for five cents each. by addressingthe Commissioner of Patents. Washington, D. C.

